* src/ds390/gen.c (genCpl): fixed bit=~(char/bit) bugs, added warning

[fw/sdcc] / src / ds390 / ralloc.c

diff --git a/src/ds390/ralloc.c b/src/ds390/ralloc.c
index def06af2e1a9e36dcb04af4227b3db8a0a17ec9f..fbb65ed8174bbdffb2a4db8bf59433602d00f963 100644 (file)
--- a/src/ds390/ralloc.c
+++ b/src/ds390/ralloc.c
@@ -1271,7 +1271,7 @@ serialRegAssign (eBBlock ** ebbs, int count)
 
       unusedLRs = deassignUnsedLRs(ebbs[i]);
 
-      /* of all instructions do */
+      /* for all instructions do */
       for (ic = ebbs[i]->sch; ic; ic = ic->next)
         {
 
@@ -1325,6 +1325,16 @@ serialRegAssign (eBBlock ** ebbs, int count)
                   spillThis (sym);
                   continue;
                 }
+
+              /* if this is a bit variable then don't use precious registers
+                 along with expensive bit-to-char conversions but just spill
+                 it */
+              if (SPEC_NOUN(sym->etype) == V_BIT)
+                {
+                  spillThis (sym);
+                  continue;
+                }
+
               /* if trying to allocate this will cause
                  a spill and there is nothing to spill
                  or this one is rematerializable then